Pete Tyler

Pete was born on September 15, 1954 and died on November 7, 1987 in a hit-and-run accident when Rose was about six months old.

In Father's Day, Rose asked the Doctor to take her back to 1987 so she could witness her father's death. Jackie had told Rose as a child that her father had died alone, and Rose wanted to be there for him. When she was faced with the reality of what she was seeing, however, Rose impulsively rushed forward and saved Pete from being run down, changing history and causing a temporal paradox that damaged time. This attracted the destructive Reapers, who began to "sterilise" the wound in time by devouring everything in sight.

Pete eventually figured out that Rose was his daughter, and on listening to her describe what an ideal father he had been, also realised that Rose was lying to cover up the fact that he was supposed to be dead. The presence of Rose awakened Pete's paternal instincts; to save everyone and restore history, he deliberately stepped in front of the car that should have killed him. His sacrifice dismissed the Reapers and put time back on track, although history did change to a small extent â€" this time the driver did not flee the scene, and Rose was there to hold Pete's hand while he was dying. Pete died with a smile while looking on his daughter's face.

Although Pete was gone, it was his persistent spirit and a penchant for (as Jackie put it) "mad ideas" that Rose inherited. These pushed her to keep trying even when all hope seemed lost in the season finalé The Parting of the Ways, and save the world again.

Pete Tyler (parallel universe)

The first assault of the Cybermen was at his mansion, on the occasion of Jackie's fortieth birthday. At first believed to be one of Lumic's minions, Pete revealed that he had in fact been a mole (under the name of Gemini) secretly broadcasting information about Lumic's dealings on an encrypted channel. He believed he was getting it to the Security Services, but was disappointed to discover he had in fact been communicating with Ricky Smith's small-time resistance group, the Preachers. He agreed to infiltrate the Cyber-factory and was horrified to discover that Jackie had been converted into a Cyberman.

Escaping from the burning factory, Pete was eventually responsible for severing a rope ladder which Lumic (now the Cyber-Controller) was using, sending Lumic falling to his apparent death. Rose tried to tell Pete about her origins, but he was unable to handle this information, quickly slipping away to help deal with the mess Lumic had left.

In the 2006 series finale, Doomsday, Pete had apparently moved into a position of leadership in the People's Republic. The surviving Cybermen from Lumic's factories had invaded the Doctor's universe thanks to a breach between realities caused by the passage of a Dalek void ship. Using technology from his universe's version of the Torchwood Institute, Pete, Mickey Smith and Jake Simmonds travelled to the Doctor's universe to help defeat the Cybermen. It became apparent, however, that constant travel between the worlds was damaging both universes, and only the Doctor could seal the breach.

Initially, Pete was ambivalent about the fate of the Doctor's world, Rose and that world's version of Jackie, but was ultimately unable to shake his concern for them. He met Jackie when he crossed over, swiftly forming a new relationship with her after an initial awkwardness, and later rescued Rose from falling into the breach. Following the sealing of the breach, all three Tylers were a family again on the parallel Earth, along with Mickey. When last seen, he and Jackie were expecting another child.